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DATE: 02/10/2005                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 12:21:36                                       2004 CONFIDENCE INTERVAL DETAIL                                    REPT: PTS428
                                                              220/Tarrant                                               VRSN:      P
                                                        220-917/Castleberry ISD
____________________________________________________________________________________________________________________________________
         (1)           (1)                (1)              (1)                (1)              (2)            (3)
      # STRATUM     CATEGORY          LOCAL VALUE     STRATUM RATIO       STATE VALUE      SAMPLE SIZE    TOTAL PARCELS
      _________     ________          ___________     _____________       ___________      ___________    _____________

           1           A               86,455,123        0.9972            86,697,877               16            1,777
           2           A               86,155,538        1.0502            82,037,267               46            1,332
           3           A               86,334,248        1.0133            85,201,074               34            1,053
           4           A               86,172,226        1.0485            82,186,196               22              749
           5           F1              12,747,330        0.9808            12,996,870                7              132
           6           F1              12,724,728        0.8368            15,206,415                7               54
           7           F1              12,579,799        0.9456            13,303,510                8               25
           8           F1              12,583,615        0.9818            12,816,882                5               12
  RANDOM TOTALS:                      395,752,607                         390,446,091              145            5,134
  CATG D1 EXCEPTION VALUES:                 5,884                               5,884
 TOTAL TEST VALUES (4):               395,758,491                         390,451,975
 MARGIN OF ERROR PERCENT:               5.0000001
 MARGIN OF ERROR VALUE:                19,522,599
 CONFIDENCE INTERVAL VALUES (5):
   STATE LOWER LIMIT:                 370,929,376 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   LOCAL TEST VALUE:                  395,758,491 (WITHIN CONFIDENCE INTERVAL)
   STATE UPPER LIMIT:                 409,974,574 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
 VALUE ASSIGNED (6):                  361,167,020 (SEE ISD SUMMARY WORKSHEET)

 SOURCES:
 (1) SEE STRATIFIED CATEGORY WORKSHEET REPORTS PTS236, PTS430
 (2) NUMBER OF PARCELS SAMPLED BY STAFF
 (3) TOTAL CATEGORY PARCELS FROM STRATIFICATION REPORT APPRAISAL ROLL, OR SELF-REPORT
 (4) INCLUDES ANY PARCELS IN A, B, C, D3, F1, G1, G2,OR L1 MARKED AS EXCEPTION PROPERTIES
 (5) UNSTUDIED CATEGORIES AND SUB-CATEGORIES WERE NOT INCLUDED IN THE CONFIDENCE INTERVAL VALUES